Winder for weft bobbins



April 26, 1932. E. zlNDr-:L 1,855,814

WINDER FOR WEFT BOBBINS Filed July '7, 1930 FIG. 4

liatented pr. 26,

UNITED STATES PATENT OFFICE ERNST ZINDEL, OF ERLENBACH, SWITZERLAND, ASSIGNOR TO FIRM SCHRER- NUSSBAUMER & CO., OF ERLENBACH, SWITZERLAND WINDER FOR WEET BOBBINS Application led July 7, 1930, Serial No. 466,280, and in Switzerland July 8, 1929.

The present invention refers to improvements in Winders for Weft bobbins. UnWinding the thread through a longltudinal bore of the bobbin body of VWett bobbins has proved to be very advantageous for saving the thread and it is of particular importance for delicate threads such as threads of artificial silk. l

In order to avoid the tedious subsequent passing of the thread through the longitudinal bore of the bobbin after the latter has been removed from the Winder, With the bobbin Winder forming the Subj ect matter of the present invention the spindle to Which the bobbin body is attached for the Winding is provided With a threading needle housed in the longitudinal bore of the bobbin body, the thread being placed around the needle at the I finish of the Winding operation for the puren pose of drawing the Weft thread through the longitudinal bore of the bobbin body When the bobbin is removed from the spindle of the Winder.

TWO const-ructional examples of the Wett bobbin Winder according to the invention are illustrated on the accompanying drawings in Which only those parts of the Winder are 1l'- lustrated Which are necessary for the comprehension of the present improvement.

In the drawings Fig. 1 shows the rst constructional example (in elevation With parts illustrated in section) in Which a bobbin body is carried by the free end of the Winding spindle,

l :as Fig. 2 shoWs a detail in elevation,

Fig. 3 shoWs on a larger scale an end view of the detail illustrated in Fig. 2,

Fig. 4; illustrates the second constructional example (in elevation With parts shoWn in 4o section) in Which a bobbin body is held at both ends,

Fig. 5 is a plan-view of Fig. 4 With the bobbin released at one end, and

Fig. 6 shoWs an elevation correspondingV 5 to that of Fig. 4 for explaining the removal of a bobbin from the Winder.

There are tWo knoWn principal types of bobbin Winders, one of them having a rotating spindle and a reciprocating thread guide,

the other having a stationary thread guide and a rotating and reciprocating spindle'. The Winder according to the present invention is of the second type. In the rst construc-` tional` example, 1 in Fig. 1. 1 denotes the y Winding spindle projecting out of the ma- 55 chine casing 2 and performing a rotating and an axially reciprocating motion during the Winding operation, as is Well knoWn in the art. Into theV spindle 1 a mandrel 3 is p screwed Which forms an extension of the u spindle and carries at its free end fixed to the latter by means of a screW a needle 4 Which ends in a hook 5. Between an adjustable collar 6 and a shoulder formed on the mandrel 3 a disk 7 and a clamping piece 8 65v having three clamping arms 9 are arranged. At its front end the mandrel Sis provided With a non-metallic liner 10 made of bre and the like. v As is shoWn in Fig. 1 on the `free end of 70 the Winding spindle and on the mandrel 3 respectively a bobbin body 12 is placed Which has been provided With windings 13 of thread by the operation of the Winder. The arms 9 of the clamping member 8 cooperate With 75 rings 14 provided on the bobbin body 12 and hold the latter removably on the mandrel 3. The longitudinal bore 15 of the bobbin body lits snugly on the liner 10 of the mandrel 3. The needle tV housed in the bore 15 ofthe bobbin body v12 projects With its free end beyond the bobbin body 12. The outer end portion of the bore 15 is provided With a lining of a lsoft material such` as velvet v or the like. V85:

After the bobbin body has been provided With the Windings 13 of the thread the free end of the thread is slung around the end of the needle 4 projecting beyond the bobbin body. Thereupon the bobbin body is draWn oil the Winding spindle 1 andthe mandrel 3 respectively Whereby the part of the thread caught by the hook 5 of the needle is drawn through the bore 15 of the bobbin body 12. Thus the Wett bobbin is ready for being used in the shuttle of a loom. The soft lining 16 provided in the bore 15 serves for braking vthe thread during the unWinding.

In the second Y constructional example illustrated in Figs. 4-6 the mandrel 3 is axially 100 displaceable within the spindle 1 but secured against rotation relatively to the spindle. A coil spring 17 tends to urge the mandrel 3 in the outward direction which movement is limited by a set screw 18 screwed into the spindle 1. The hooked needle 4, 5 is fixed in the spindle 1 itself by means of a set screw and passes through the central bore of the mandrel 3. The latter ends in a knob 19 provided with a resilient insertion 20 made of rubber and with a central pin 21 Jfor entering the longitudinal bore 15 of the bobbin body 12.

(2o-axially to the spindle 1 and the mandrel 3 a member 22 provided with a resilient insertion 23 for receiving the bobbin body 12 is arranged. The member 22 is carried by an arm 24 fixed to a supporting rod 25 which is guided to be axially displaceable parallel to the spindle 1. The supporting rod 25 is reciprocated in unison with the spindle 1 to which it is connected within the casing 2. 26 denotes a guide rod for a feeler (not illustrated in the drawings) and which is advanced in a step by step manner by the bobbin during the winding process. On the `guide rod 26 an arm 27 is fixed serving .as a guide member to the rod 25.

As is shown in Fig. 4 the bobbin body 12 iis held with its ends between the mandrel andthe member 22 in as much as one end of its bore 15 fits snugly to the central pin 28 .of the .mandrel head 19 and its other end rests in the recess of member 22 containing .the insertion 23; this recess tapers inwardly so that the bobbin body is automatically centered.

After ythe thread has been wound on the bobbin body 12 the mandrel 3 is pressed by `means of the bobbin against the action of its spring 1:7 so far that the needle 4 with the hook 5 projects out of the bobbin body 12 as is shown in F ig. 5. Thereupon the free end of `the thread is placed around the projecting end of the needle 4 and the bobbin is v withdrawn, as is shown in Fig. 6, whilst the mandrel 3 `is held back, from the spindle 1 or from the pin 21 respectively, whereby the end of -the thread retained by the hook 5 of the needle 4 is pulled through the bore 15 of the bobbin 12 so that the bobbin is ready for further use.

I claim: Y

1. In a Vmachine of the type described, a winding spindle adapted to receive bobbin bodies having longitudinal bores, and a needle liXed to said winding spindle and adapted to be housed in the longitudinal bore of the bobbin body, said bore being larger in .diameter than the needle, whereby Arelative lateral play between the bobbin and the needleis permitted.

2. AIn a machine of the type described, a winding spindle adapted to receive bobbin bodies havingV longitudinal bores, and a needle provided with a hook and fixed to said winding spindle and housed in the longitudinal bore of the bobbin body when assembled, said bore being larger in diameter than the needle, whereby relative lateral play between the bobbin and the needle is permitted, and whereby said needle causes the end of the thread placed on it to be drawn through the bore of the bobbin when the latter is withdrawn from the machine.

3. In a machine of the type described, a winding spindle vadapted to receive bobbin bodies having hollow longitudinal bores, a mandrel removably fixed to said winding spindle, and a hooked needle fixed to said mandrelV and housed in the longitudinal bore of the bobbin body when assembled, said bore being larger in diameter than the needle, whereby relative lateral play between the bobbin and the needle is permitted, and whereby said needle causes the end of' the thread placed on it to be drawn through the bore of the bobbin when the latter is withdrawn from the machine.

4. In a machine of the type described, a winding spindle adapted to receive bobbin bodies having hollow longitudinal bores, a mandrel removably fixed to said winding spindle, and provided with a non-metallic part adapted to enter into frictional engagement with the bore of said bobbin body for holding the latter, a clamping device carried by said mandrel and cooperating with the bobbin for holding the latter, and a hooked needle fixed to said mandrel and housed in the longitudinal bore of the bobbin body when assembled, said bore being larger lin diameter than the needle, whereby relative lateral play between the bobbin and the needle is permitted, andwhereby said needle causes the end of the thread placed on it to be drawn through the bore of the bobbin when the latterris withdrawn from the machine.

In testimony whereof I have signed my name to this specification. 

